Stone-sawing machine



Patented Sept. l3, I898.

W. LAUTZ.

STONE SAWING' MACHINE.

(Application filed May 13, 1897.)

2 Sheets-8heet I.

(No Model.)

THE "cams vnzas co, PHoIo-Ln'uomhw N0. 6|0,653. Patented Sept. l3, I898.

W. LAUTZ.

STONE SAWING MACHINE.

(Application filed May 13, 1897.)

(N0 Model.)

2 Sheets-$heet 2.

NHED

WILLIAM LAUTZ, or BUFFALO, NEW YORK.

STONE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 610,653, dated September 13, 1898.

Application filed May 13, 189 '7. Serial No. 636,845. (No model.) 7

T0 aZl whom it may concern.-

Be it known that I, VILLIAM LAU'IZ, a citizen of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Stone-Sawing Machines, of which the following is a specification.

This invention relates to the class of stonesawing machines employed for sawinga block of marble or other stone into a number of slabs at one operation, the saws being mounted in a vibrating frame or gate suspended from vertically-movable frames or followers which are guided in the stationary frame of the machine and allowed to descend by an automatic feed mechanism as the sawing of the stone progresses. V

The object of my invention is the construction of a machine of this character whereby curved slabs of a uniform radius of curvature can be sawed at comparatively small cost and with a minimum waste of material.

In the accompanying drawings, consisting of two sheets, Figure 1 is a side elevation of a stone-sawing machine embodying my invention. Fig. 2 is a vertical cross-section of the same. Fig. 3 is a horizontal section of the machine in line 3 3, Fig. 1. Fig. 4 is a fragmentary cross-section of the saw-frame on an enlarged scale, showing one of the supporting-brackets of the wearing-shoes carried by the saw-frame.

Like letters of reference refer to like parts in the several figures.

A represents the posts or uprights of the stationary frame of the machine, A the longitudinal beams connecting the upper ends of the uprights, and A the cross-beams.

13 represents the vertically-movable followers or frames, from which the vibrating sawframe 0 is suspended by chains D or other suitable hangers, which permit the saw-frame to move laterally in the stationary frame, as well as reciprocate horizontally.

0 represents the gang of parallel saws, rigidly mounted in the saw-frame in any wellknown or suitable manner. The saw-frame is vibrated from the source of power by the usual pitman c. The followers B are suitably guided in the main frame and allowed to descend automatically by the ordinary and well-known feed-screws and connecting-gearing shown in the drawings,or by any other means, this feed mechanism forming no part of my invention.

E E E E are curved guides which are arranged on the main frameand whereby the saw-frame is deflected laterally and caused to descend in the are of a circle corresponding to the curvature of the guides, thus compelling the saws to cut the blockof marble or other stone into slabs of uniform curvature. Four of such guides are preferablyemployed, which are secured to the four uprights of the main frame, as shownin Fig. 3, and the two guides E E on one side of the saw-frame are provided with a convex face, while the guides E E on the opposite sideare provided with a concave face, as shown in Fig. 2, the working faces of the two pairs of guides being of uniform radius or curvature. The guides are provided with a metallic facing e. The sides of the saw-frame may bear directly against the guides but they are preferably provided at their sides with horizontal shoes or wearing-bars F, which slide against the guides and relieve the saw-frame from Wear. These shoes preferably consist of short lengths of pipe or tubing which are adjustably supported in brackets f, projecting from the sides of the saw-frame, the tubes being secured in the brackets by set-screws f When these tubes or shoes become worn on one side, they are turned in their brackets, so as to present another unworn side to the guides, the setscrews f being loosened for this purpose and again tightened after effecting the adj ustment. By this construction the life of the shoes is not only prolonged, but they present a comparatively small contact-surface to the guides, diminishing the friction correspond ingly. This small contact-surface also allows the shoes to closely follow the curved faces of the guides and causes the saws to cut accurately and descend in a true curve. The guides are preferably made laterally adjustable on the stationary frame, so that they can be adjusted to bear closely against the shoes of the saw-frame, and for this purpose the guides may be provided with transverse slots g, through which the fastening-bolts g of the guides pass, as shown in Fig; 2. In the use of the machine, as the vibrating saw-frame descends it is compelled to follow the curve of the guides E E E E causing the gang of parallel saws to descend in the same curved path and dividing the block of stone into a number of curved slabs, and as the suspended saw-frame maintains a horizontal position throughout its vertical movement and is bodily moved sidewise as the sawing operation advances all of the slabs are sawed to a uniform radius of curvature.

Although the saws are rigidly secured in the vibrating frame they will not bind in the saw-kerfs in sawing material into slabs of comparatively large radius, such as the curvature of the guides shown in the drawings.

In order to saw curved slabs of different curvatures, it is necessary to employ different sets of guides with faces of corresponding curvatures. To permit the ready substitution of one set of guides for another, the same are detachably secured to the main frame, as shown in the drawings.

By the use of my improvement a large number of uniformly-curved slabs can be sawed at one operation with a very small percentage of waste, thus effecting a considerable saving both in labor and material.

The improvement does not require a reconstruction of the ordinary sawing-machines, but is practically an attachment which can be applied to existing sawing-machines at small expense, the only change required being the substitution of chains or other suitable hangers which permit the necessary lateral movement of the saw-frame for the suspension-rods ordinarily employed in such machines. The attachment is, moreover, very simple and compact and has no projecting parts which obstruct the space on opposite sides of the machine.

I claim as my invention- 1. The combination with the stationary frame, of a vibrating horizontal saw frame which is vertically movable in the main frame and provided with a gang of saws which are rigidly secured side by side in the saw-frame, and a convex and a concave upright guide of equal curvature arranged on the stationary frame and causing the saw-frame to descend in a curvilinear path, whereby a plurality of like curved slabs are produced during one descent of the saw-frame, substantially as set forth.

2. The combination with the stationary frame of the machine, of a vibrating vertically-movable saw-frame capable of moving bodily in a lateral direction and having a gang of saws arranged side by side and held against lateral movement in the saw-frame, and curved upright guides arranged on the stationary frame on opposite sides of the sawframe for causing the latter to descend in a curvilinear path, one of said guides having a convex face and the opposite guide having a concave face of the same radius as the convex guide, substantially as set forth.

3. The combination with the stationary frame of the machine, of a vertically-mow able follower or frame, a saw-frame suspended from said follower by flexible connections and capable of moving bodily in a lateral direction and having a gang of parallel saws which are held against lateral movement in the saw-frame, and curved stationary guides arranged on the stationary frame on opposite sides of the saw frame, whereby the sawframe is shifted laterally and caused to descend in a curvilinear path, substantially as set forth.

4. The combination with the stationary frame of the machine, and a curved upright guide secured to the same, of a vibrating sawframe capable of a compound vertical and lateral movement and provided at its side with a tube or cylindrical shoe bearing against said guide and capable of rotary adjustment on the saw-frame, whereby different portions of the tube or shoe may be presented to the guide, substantially as set forth.

Witness my hand this 7th day of April,

WILLIAM LAUTZ. Witnesses:

CARL F. GEYER,

ARTHUR L. GoE'rz. 

